1) 掘進くっしん #234,239 Inflections of 掘進 Class Suru verb Stem Inflected ending ✕ Link copied! くっしん [0] Meaning Shirabe Noun Suru verb Intransitive verb tunnelling (through); excavation; drilling; boring Kanji 掘 クツ dig, delve, excavate 進 シン advance, proceed, progress Forms 掘進#234,239掘進くっしんくっしんくっしん